System for collecting dust and smoke when coke is pushed from a coke oven

ABSTRACT

A hood is movably mounted to a coke quenching car and cooperative with a coke guide that keeps the hood in place relative to the coke guide as the coke quenching car moves relative to the hood. Dust and smoke from pushed coke passing through the hood are collected in the hood. Gas scrubbing equipment is associated with the coke guide and the hood to remove particulate matter from the gasses collected in the hood.

March 7, 1-972 L 3,647,636

SYSTEM FOR COLLECTING DUST AND suoKE- WHEN COKE IS PUSHED FROM A COKE OVEN Filed Jan. 19, 1970 4 Sheets-Sheet 1 INVENTOR. 50mm .1 #5144 FIG. 2

I March 7 1972 Filed Jan. 19, 1970 SYSTEM FOR COLLECTING DUST SMOKE WHEN COKE. IS PU SHED FROM A COKE OVEN v INVENTOR. EQWIIDJ HELM E. J. HELM 3,647,635 SYSTEM FOR COLLECTING DUST AND SMOKE WHEN COKE IS PUSHED FROM A COKE OVEN March 7, 1972 Filed Jan. 19 19 70 4 Sheets-Sheet 3 v INVENTOR. ioumo J. HELM March 7, 1972 E J HELM 3,647,636

SYSTEM FOR GOLLETfNG DUST AND SMOKE WHEN COKE IS PUSHED FROM A COKE OVEN 4 Sheets-Sheet 4 Filed Jan. 19 1970 INVENTOR. EDWARD J. HELM United States Patent 3,647,636 SYSTEM FOR COLLECTING DUST AND SMOKE WHEN COKE IS PUSHED FROM A COKE OVEN Edward J. Helm, Pittsburgh, Pa., assiguor to Koppers Company, Inc. Continuation-impart of application Ser. No. 840,447, Oct. 13, 1969. This application Jan. 19, 1970, Ser.

Int. Cl. Cb 33/00 US. Cl. Z02263 13 Claims ABSTRACT OF THE DISCLOSURE A hood is movably mounted to a coke quenching car and cooperates with a coke guide that keeps the hood in place relative to the coke guide as the coke quenching car moves relative tothe hood. Dust and smoke from pushed coke passing through the hood are collected in the hood. Gas scrubbing equipment is associated with the coke guide and the hood to remove particulate matter from the gasses collected in the hood.

CROSS REFERENCE TO RELATED APPLICATION The present application is a continuation-in-part of application Ser. No. 840,447 filed Oct. 13, 1969, and now abandoned.

BACKGROUND OF THE INVENTION For a number of years, considerable effort has been expended to develop a practical system for collecting the smoke and dust which are liberated as the coke oven charge is pushed from a coke oven into the quenching car. As the coke cake breaks up and falls into the quenching car, substantial quantities of dust are carried into the atmosphere by hot air rising from the coke. There is usually some residual volatile matter also in the coke which flashes into the air as the coke falls into the quenching car. Whenever there are spots or areas of incompletely coked material in the charge, large quantities of smoke may be liberated as this material burns as it falls through the air. The smoke comes from incomplete combustion of the hydrocarbons liberated. The quenching car is moved slowly in front of the oven being pushed in order to catch the coke in a relatively uniform layer in the bottom of the quenching car and to present as uniform a layer of coke as possible for the quenching operation. After the coke has fallen into the quenching car there is usually very little additional smoke and dust emitted. The residual volatile matter evolved during travel to the quenching station, usually burns with a very short clear flame that produces no smoke.

Various methods have been suggested to collect the dust and smoke, including the provision of an enclosure over the entire quenching track with connections to a source of suction and to dust collecting equipment. One such system comprises alarge hood that is suspended from a coke guide on the coke side oven bench with connections from the hood to a large wet gas scrubber for pulling asuction on the hood and for scrubbing out particulate matter in the gas. This hood encloses the coke guide and extends out over the full width of the quenching car, and is equivalent in length to about half the length of the quenching car. A substantial vertical clearance is provided between the ends of this hood and the quenching car in order to permit vertical clearance for the cab of the locomotive, which extends several feet above the top of the quenching car. There isalso a lesser, but still substantial, vertical clearance between the sides of the hood and the top of the quenching car.

In attempting to provide a suction at all points of clear- 3,647,636 Patented Mar. 7, 1972 'ice ance between the hood and the quenching car, very large fans and scrubbers are required with this arrangement. When equipped with two scrubbers of say, horsepower each, this system provides only a fair performance when there is little or no wind, but with substantial wind= SUMMARY OF THE INVENTION Apparatus for collecting dust and smoke which are generated as coke is being pushed from a coke oven chamber comprises a coke guide that is movable along the coke side of the battery and a coke quenching car that is movable along a path substantially parallel to the path traversed by the coke guide. A hood is movably mounted to the coke quenching car and is positionable in cooperation with the coke guide for receiving coke that passes through the guide. Means is provided to maintain the hood in position relative to the coke guide as the coke quenching car moves relative to the hood in order to distribute coke evenly in the coke quenching car. Equipment is provided on or adjacent the coke guide car to remove particulate matter and gasses from the hood.

For a further understanding of the invention and for advantages and features thereof, reference may be made to the following description taken in conjunction with the drawing which illustrates for the purposes of exemplification and embodiment of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. 1 is a schematic plan view of a quenching car incorporating the invention shown in a position along side of coke oven battery;

FIG. 2 is a vertical elevational view, partly in section, along line IIII of FIG. 1;

FIG. 3 is a plan view along line III-III of FIG. 2 showing additional structure not shown in FIG. 2;

FIG. 4 is a vertical elevational view of the quenching car as viewed along line IVIV of FIG. 1;

FIG. 5 is a schematic elevational view, partly in section of a modification of the apparatus of FIG. 2; and

FIG. 6 is a detail of a portion of the apparatus of FIG. 5.

DETAILED DESCRIPTION FIG. 1 illustrates a schematic plan view of a portion of a coke oven battery 11, particularly that portion at which a coke guide 13 and a coke quenching car 15 are positioned to receive coke that is ready to be pushed from a coking chamber 17.

The quenching car 15 is provided with the usual wheels and axles 19 that cooperate with rails 21, and the quenching car 15 has the usual inclined bottom 23 and discharge gate 25, on the far side away from the coke oven battery 11. The top of each one of the longitudinally extending side walls 27 of the quenching car 15 is provided with a channel section 29 that forms a track for rollers 31 that are mounted to a smoke and dust collecting hood 33.

Further, the quenching car 15 is provided with a conventional coupler 32 that cooperates with a coupler extension 34 on a conventional coke quenching car locomotive (not shown).

The hood 33 has a generally rectangular shape in plan view with two vertical front and back walls 35 and upwardly inclined side walls that form a top, but the hood 7 33 has no bottom so that pushed coke can pass through the hood 33 into the coke quenching car 15 1 The vertical front wall 35 that faces the coke oven battery 11 is provided with a recess 37 that also has a generally rectangular opening 39 in the vertical wall of the recess. The opening 39 is surrounded by a frame 41 that is resiliently biased, as by springs 43.

The hood 33 is also associated with a downwardly extending baffle plate 45 that is carried by the hood 33 in a manner to be described hereinafter. The baffle plate 45, as shown in FIG. 2, is so shaped that it is close to, but yet is spaced slightly apart from, the sloping bottom 23 and the discharge gate 25, for a purpose that will .be ap parent hereinafter.

The coke guide 13 is comprised of two cooperating portions 55, 57 that are mounted on a coke guide car 59. The coke guide car 59 is also provided with conventional wheel and axle assemblies 61 that coact with rails 63 secured to an oven bench structure 65. From FIG. 3 it will be noted that the vertically and horizontally extending structural members 67 provide a fixed structure, mounted to the coke guide car 59, for supporting opposed pairs of rollers 69, 71 which coact with the respective coke guide portions 55, 57 so that both respective portions 55, 57 are movable toward and away from the hood 33 and the coke oven chamber 17 respectively.

As may be noted from FIG. 3 the coke guide portion 57 telescopes within the larger rectangular shaped portion 55; the larger coke guide portion 55, being movable on the roller 69, is provided with a flange 73 that is adapted to coact with the frame 41 around the opening 39 and the hood 33.

Further, the coke guide portion 55 is also provided with a. pair of openings 75 in the vertical wall, that faces the coke oven battery 11, and each opening 75 receives a straight circular tail-end portion 77, 79 of curved suction pipes 81, 83 that are fixed to the structure 67. The suction pipes 81, 83 connect with a gas cleaning and scrubbing apparatus that may be suitably mounted on the coke guide car 59.

The telescoping guide portion 57, being movable on wheels 71, is adapted to abut the vertical face of the coke oven chamber 17 from which coke is to be pushed. The outer end of the coke guide portion 57 is provided with stops 87 that cooperate with other stops 89 fixed to the outwardly moving guide portion 55. Thus, when the two coke guide portions 55, 57 are extended into operative relation with the coke oven chamber 17 and the frame 41 respectively, the stops 87, 89 abut.

The supporting structure 67 also carries a pair of positioning cylinder-piston assemblies 91, 93, each of which is mounted in a horizontal position with piston rods 95, 97 facing toward the quenching car 15. The piston rods 95, 97 carry rollers 91, 101 at their outward free ends, as shown in FIG. 3. The cylinder-piston assemblies 91, 93 may be actuated in any suitable manner to advance and retract the piston rods 95, 97 for a purpose that will be explained hereinafter.

One form of apparatus 103 to actuate the piston rods 95, 97, and to advance and retract both the coke guide portion 57 and the portion 55 is shown in FIG. 2. Other suitable mechanism, such as fluid-actuatedcylinder-pistons, rack and'power driven pinions, and the like may occur readily toone having ordinary skill in the art.

The apparatus 103 includes, on each side of the supporting structure ,67, a quadrant 105 that is pivotally mounted on a shaft 107 which is driven by any suitable rotary power source, such as a motor-driven speed reducer 108, or in any other suitable manner. The quadrant 105 has a rack face 109 that engages with a gear 111 mounted about where shown, and the gear 111 coacts with a rack 113 fixed'to the piston rods 95 and 97.

The apparatus 103 also includes a lever 115 that is pivotally mounted to a shaft 121 attached to the supporting structure 67 and the lever 115 is pivotally connected to links 118,-119 that are connected to the coke guide portion 55, and to the coke guide portion 57. Suitable means,

' able apparatus, is provided for rotating the shaft 121,

whereby both of the coke guide portions 55, 57 move simultaneously relative to the supporting structure 67. Suitable means maybe provided to synchronize the motordriven speed reducers 108, 120 and such movement. may also be synchronized with the movement of the quadrant 105. Thus, the coke guide portions 55,,57 may be fsimultaneously moved into operative position, and the hood may also be properly positioned and secured to the coke guide portion 55 in a manner to be described hereinafter.

As mentioned previously, the baffle plate 45, is carried by the hood 33 and one apparatus for carrying the baffle plate is illustrated in FIGS. 1 and 4.

The baffle plate 45 is suspended from a transversely extending bar or rod 123 that coacts with notched plates 125 positioned on the under side of the hood 33 about where shown in FIGS. 1 and 4. Adjacent the right hand end wall 127 of the quenching car 15, as viewed in FIGS 1 and 4, there are two spaced apart baffle plate retainers 129 that are secured to the sides of the quenching car 15. These baflle plate retainers 129 have an open ended, U-shape as shown, to engage the bar or rod 123 and thereby support and retain the bafiie plate 45 in one position adjacent the right hand end wall 127. Of course, other suitable means may be provided to engage and carry and retain the baflle plate 45 if preferred.

While the invention is illustrated in association with-a non-tilting quenching car, it is understood that it may be used also with tilting bottom type quenching cars.

Now, when it is necessary to push coke from-a coking chamber, such as chamber 17 for example, the coke guide 13 is positioned at the chamber 17, as shown in FIG. 1, and the coke quenching car is brought into position adjacent the coke guide. Initially, following a previous cycle' of operations, the hood '33 will be located at the'right hand end of the coke quenching car 15, about'where shown in phantom in FIG. 4. The coke quenching car then is maneuvered until the hood opening is approximately aligned with the longitudinal axis of the coking chamber and with the coke guide. Thereafter, the motor-driven speed reducer 108 actuates the quadrant to advance the piston rods 95, 97. As the piston rods 95, 97 advance, the rollers 99, 101 cooperate with the bevelled portions 53 and the hood, being freely movable'laterally on the coke quenching car 15, becomes centered with respect to the common axes of the chamber 17 and the coke guide 13.

Simultaneously, the motor-driven speed reducer actuates the guide portion 57 up against the face of the coke oven chamber, and the coke guide portion 55 against the frame 41. The frame'41, being resiliently mounted, is disposed in close relation to the coke guide portion 55.

Thereupon, the coke quenching car 15 is moved towards positioned the right, as viewed in FIG. 1, until the hood. is at the left hand end of the coke quenching car.

Initially, the baffle plate 45 is also at the right hand end of the cokequenching car 15, and when the coke quenching car moves toward the right, the bar or rod 123 of the baffle plate engages the notched plates 125, and the battle plate then is carried by, and remains stationarywith respect to, the hood. When the hood becomes positioned at the left hand end of the coke quenching car, the bafile plate is at the right hand end of the hood, as viewed in FIG. 4. l I

As coke is pushed from thecoking chamber 17, the coke falls into the coke quenching car that is moved laterally by the locomotive in order to distribute the coke uniformly in the car. The baffle plate provides a partial seal at the right hand end of the hood to limit the amount of air entering the hood during pushing. The coke in the quenching car provides a partial air seal at the left hand end of the hood. When the hood is at the left hand endof the quenching car at the start of the coke pushing, suit able plate structure 131 of the car provides an air seal to minimize the air pulled in at this point. Thus, practically all of the dust, dirt, and smoke emitted by the pushed coke passes into the suction pipes 81, 83 and into suitable scrubbing apparatus carried on the coke guide car.

If it is necessary or desirable to further reduce the opening under the baffle at the right hand end of the hood, and the opening between the coke and the left hand end of theho'od after the start of the push, flexible baflles or curtains can be provided at these points. Such an extension under the baflle atthe right hand end of the hood must be capable of passing over the structural members extending upward into the body of the quenching car at several locations. The flexible baflle or curtain suspended from the left hand end of the hood, if provided, must be capable of passing over the bed of coke in the quenching car, and must also be arranged to remain suspended just inside the baflle 45 when the hood is in the farthest position for quenching beyond the right hand end of the quenching car, or be capable of passing back and forth over the top of baffie 45 and the right hand end of the quenching car.

Such a flexible baflle or curtain can, for example, be made of rectangular pieces of stainless steel plate linked together with rings welded to the top and bottom of the plates and horizontal rods passing through the rings. By adding or removing pieces of plate, the flexible baflle or curtain can be adjusted in the field to close a large percentage of the open area under the ends of the hood.

By the time all of the cone has been pushed from the coking chamber, the hood will be located at the right hand end of the coke quenching car. The baflle plate moves with the hood until the baflie plate engages the bafile plate retainers'which keep and maintain the baffle plate at the right hand end of the coke qeunching car, where shown in FIG. 4. Actually, the hood moves onto an extension of the coke quenching car, as suggested in FIGS. 1 and 4, so as not to interfere with quenching water during the quenching operations.

Then, the quadrant may be actuated to retract the piston rods and the wheels from coacting with the hood and the lever may be pivoted to telescope the coke guide portions.

Thereafter, the quenching car moves to the quenching station where the coke is quenched in the normal manner. The hood, may be suitably locked in the position at the right hand end of the coke quenching car in any suitable manner during the travel to and from the quenching station.

1' Those skilled in the art will recognize that the hood of the present invention fits relatively close to the quenching car in the location where coke is discharged into the car, and it is not necessary to provide vertical clearance under the ends of the hood for the, cab of the quenching car locomotive.

. Further, because the hood is mounted on the quenching car as it is, a closer clearance can be maintained between the sides of the hood and the top of the sides of the quenching car.

Since the hood prevents the locomotive operator from seeing the coke as it falls into the quenching car, it is proposed to provide an indicator in the cab of the locomotive that will indicate the relative position of the pusher ram and the quenching car in terms of percentage of travel from their, respective initial positions at the start of a push. By keeping these indicated positions together during the push, the locomotive operator can move the quenching car in a way that assures a smooth and even catch of the coke with a good distribution of coke in the quenching car.

While the foregoing description is directed to the novel apparatus illustrated in FIGS. 1-4, FIGS. 5 and 6 show a modified apparatus that is in accordance with the invention.

In FIG. 5, substantially all of the structure there shown is the samestructure shownin FIG.) except for the following principal differences, and some details, shown in FIG. 2, are omitted from FIG. 5, for clarification purposes.

In FIG. 5, a quenching car 133 is provided wtih conventional wheel and axle assemblies 135 that are mounted on rails 137 that are fixed about where shown in relation to a coke oven battery 139 and a bench 141 alongside the coke side of the coke oven battery 139. The bench supports other rails 143 on which there is mounted a wheeled coke guide car 145 that is similar to the coke guide car 59. The coke guide car 59 carries a coke guide 147 that is substantially like the coke guide 13 of FIG. 2, except as noted hereinafter.

On the coke quenching car 133, there is a hood 149 that is rollably mounted thereto as is the hood 33 of FIG. 2. However, the hood 149 is provided with an outwardly extending duct 151 that terminates some short distance from an adjacent vertical wall 153 of an elongate duct 155. The outward end portion of the duct 151 is provided with a telescoping section 157 and a mechanism 159 for moving the telescoping section 157 toward and away from the duct 155.

The elongate duct is supported in one position, shown in FIG. 5 in solid lines, alongside the hood 149 and upon structural supports 161. The elongate duct 155 has a plurality of rectangular-shaped openings 163 in the vertical wall 153; actually, there is an opening 163 opposite each coke oven chamber 165 of the coke oven battery 139. Each such opening 163 is fitted with a hinged covering 167 that is pivotable about hinge 169 fastened to the top of the covering 167 and to the inside of the wall 153.

The mechanism 159 comprises a fixed shaft 171 that extends across the duct 151 and that projects outwardly on both sides of it. To the outwardly projecting ends of the shaft 171 there are fixed lever arms 173. The free ends of the arms 173 are pivotally connected to a piston rod 175 that forms part of a cylinder-piston assembly 177. Within the duct 151 and also secured to the shaft 171 are other lever arms 179. The top and the bottom ends of the lever arms 179 are pivotally connected to horizontally extending links 181 and 183. The link 183 is pivotally connected at 185 to the telescoping portion 157 for moving such portion horizontally toward and away from the elongate duct 155. The other link 181 is pivotally connected to another elongate link 187 that has an elongate slot 189 in it and a roller 191 journaled to its free end. A pin 193, fixed to the telescoping portion 157, coacts with the slot 189 of each lever arm 187.

Initially, the telescoping portion 157 is retracted to the position shown in solid outline in FIG. 6, and the covering 167 is in the closed or solid outline position. When the hood 149 and the coke guide 147 are aligned and coupled together as described previously herein, the cylinder-piston assembly 177 is actuated from any remote location so that the piston rod 175 retracts. As it retracts the piston rod 175 pivots the lever arms 173 counterclockwise about the shaft 171 and the internal lever arms 179 also pivot counterclockwise. Both of the lever arms 173 and 179 pivot to the dotted outline position shown in FIG. 6.

As the lever arm 179 pivots counterclockwise, the link 183 moves laterally toward the right and carries with it the telescoping portion 157. Simultaneously, the link 181 moves laterally toward the left (as viewed in FIG. 6) and pivots counterclockwise the lever arm 1 87 about the fixed pin 193. The combined lateral movement of the telescoping portion with pin 193 and the'counterclockwise pivoting of the lever 187 urges the roller 191 toward the covering 167. The roller coacts with the hinged covering 167 and pivots it about hinge 169 inward to the position shown in dotted outline in FIG. 6.

The telescoping portion 157 is provided with an angle 195 on its top and bottom surfaces and this angle abuts the vertical wall to limit the penetration of the telescoping portion into the opening 163.

In practice, the elongate duct 155 is under a slight vacuum internally wherefore smoke and gases that are collected by the hood during the pushing operation, are drawn from the hood through the duct 151 and the telescoping portion 157 into the elongate duct 155.

The elongate duct 155 is connected to a fixed suction means and gas cleaning means, such as a fan and scrubber or precipitator. Gases and particulate matter in the gases are pulled through the duct 15S and are cleaned before they are discharged to the atmosphere. This arrangement eliminates the need to carry the suction and cleaning apparatus on the coke guide car.

When pushing is accomplished, the cylinder-piston is actuated again to extend the piston rod and the telescoping portion retracts. Also, the covering closes the opening in the elongate duct. 50, too, the coke guide is drawn and the quenching car is ready to move to the quenching station.

FIG. illustrates in dotted outline another arrangement of elongate duct 155w and duct 151a. The elongate duct 155a is mounted to the coke oven battery 13-9 and the duct 151a is provided with a telescoping portion 157a that operates in the same manner as is described herein.

Those skilled in the art will recognize, from the foregoing description of one embodiment and a modification of the invention, several significant features and advantages, among which are:

That the device of the invention effectively eliminates dust and smoke that generally pollute the atmosphere when coke is being pushed from a coking chamber;

That the device of the invention is readily adaptable to new and existing coke oven facilities; and

That the device of the invention is effective in collecting and scrubbing gases emitted during the coke pushing operation.

What is claimed is:

1. In a coke oven battery having a plurality of coking chambers from the coke side of which coke is periodically pushed, the improvement comprising:

(a) a coke guide that is movable along a path parallel to the coke side of said battery and that is alignable 'with a coking chamber from which coke is to be pushed;

(b) a coke quenching car that is movable along a path substantially parallel to the path traversed by the coke guide;

(c) a hood movably mounted to said coke quenching car, said hood being positionable in cooperation with said coke guide for receiving coke that passes through said coke guide; and

(d) means to keep and maintain said hood in position relative to said coke guide as said coke quenching car moves while coke is passing through said guide and hood and is being deposited in said coke quenching car.

2. The invention of claim 1 including:

(a) means mounted to said coke guide and communicating with said hood for collecting dust and particulate matter given 01f by said coke as it is deposited in said coke quenching car.

3. The invention of claim 1 wherein:

(a) said coke guide comprises:

(i) a first portion that telescopes into,

(ii) a second portion, with both portions being movable into abutting relation with said coking chamber and said hood whereby coke and gases do not escape from said coke guide as they pass through said coke guide.

4. The invention of claim 1 wherein:

(a) said means to keep and maintain said hood in position comprises:

(i) at least one recess in said hood,

(ii) at least one fluid actuatable ram mounted to said coke guide. and

(iii) means to actuate said ram and move it into engagement with a respective recess in said hood whereby it holds said hood stationary as said coke quenching car moves relative to said hood.

5. The invention of claim 4 including:

(a) means for restricting the flow of air into said hood when coke is passing through said hood and as said coke quenching car moves relative to said hood.

6. In a coke oven battery having a plurality of coking chambers from the coke side of which coke is periodically pushed, the improvement comprising:

(a) a coke guide that is movable along a path parallel to the coke side of said battery and that is alignable with a coking chamber from which coke is to be pushed, said coke guide including:

(i) a first movable portion that telescopes with (ii) a second movable portion;

(b) a coke quenchingcar that is movable along a path substantially parallel to the path traversed by said coke guide;

(c) a hood movably mounted to said coke quenching car, said hood being positionable in cooperation with said coke guide and having an opening therein through which said coke passes when said hood and said coke guide are in axial alignment with said coking chamber'from which coke is being pushed;

(d) means to keep and maintain said hood and said coke guide in fixed relative positions while coke is passing therethrough and as said coke quenching car moves relative to said hood;

(e) means for restricting the flow of air into said hood when coke is passing therethrough, (f) means coactin-g with said hood for collecting'dust and particulate matter given oif by said coke as it is being deposited in said coke quenching car; and

(g) means for moving both said portions of said coke guide into engagement with said coke battery and said hood.

7. The invention of claim 6 wherein: a

(a) said means to keep and retain said hood and coke guide in position includes,

(i) at least one expandable member mounted to said coke guide that is engageable with said hood.

8. The invention of claim 7 wherein:

(a) said means includes a baffle disposed beneath said hood and within said coke quenching car.

9. In a coke oven battery having a plurality of chambers from the coke side of which coke passes through a coke guide the combination comprising:

(a) a coke quenching car that is movable along the coke side of said battery for receiving coke pushed from a chamber of said battery; and

(b) a hood movably mounted to said coke quenching car and cooperative with said coke guide wherefore said pushed coke passes through an opening in said hood and into said quenching car as it moves relative to said hood.

10. The invention of claim. 9 including:

(a) an elongate duct disposed adjacent said coke side of said coke oven battery, said duct having (i) a plurality of openings in one Wall with each opening being located relative to respective coke oven chamber, and

(ii) a movable closure over each said openingin said duct, and

(iii) means to move said closure and to carry gases and entrained particulate matter from said hood through said opening into said duct as coke is being pushed from a coke oven chamber.

11. The invention of claim 10 wherein:

(a) said means to move said closure and to carry gases into said duct includes:

(i) a movable conduit carried by and communicating with said hood that is adapted to coact with said opening in said duct, and

(ii) a lever pivotally mounted to said hood that connects to linkage engageable with said movable duct and said closure, and

(iii) means for pivoting said lever whereby said linkage is actuated to bring said movable conduit into cooperation with said duct and simultaneously to move said closure and to admit gases into said dust.

12. The method for collecting dust and smoke emitted from coke as it is being pushed from a coke oven chamber through a coke guide into a coke quenching car comprising the steps of: i

(a) aligning said coke guide with said coke oven chamber from which coke is to be pushed;

(b) positioning a hood on said quenching car in axial alignment with said chamber and coke guide;

(c) moving the coke guide into engagement with said hood and thereby securing said hood in position relative to said coke guide;

(d) moving said quenching car relative to said hood as coke is pushed from said oven chamber;

(e) limiting the amount of air entering the hood during the pushing of said coke;

(f) removing from the hood the smoke and gases 10 emitted from said pushed coke as said pushing continues, and simultaneously;

(e) cleaning said gases of smoke and particulate matter.

13. The invention of claim 10 including:

(a) suction means connected to said duct whereby gases entering said duct are removed through said duct; and

(b) gas cleaning means associated with said suction means whereby said gases are cleaned before being discharged to the atmosphere.

References Cited UNITED STATES PATENTS 3,547,782 12/1970 Schon 202--263 X 3,520,425 7/1970 Stender 202-262 X 3,464,894 9/1969 Tatterson 202--262 3,367,844 2/ 1968 Cremer 202--227 NORMAN YUDKOFF, Primary Examiner D. EDWARDS, Assistant Examiner US. Cl. X.R. 214-23 

